Description
Description
Calling a static method inside an xpath query like so
$xpath->query("//a[php:function('MyClass::myMethod()')]")
generates a memory leak with PHP 8.1 and PHP 8.2. It used to work fine with PHP 7.2.
I have written a minimal script to reproduce the issue.
<?php
class MyClass
{
public static function doesNothing(string $var): bool {
return true;
}
}
libxml_use_internal_errors(true);
$html = file_get_contents('hacks.html');
$doc = new DOMDocument();
$i = 0;
while(true) {
$doc->loadHTML($html);
$xpath = new DOMXpath($doc);
$xpath->registerNamespace("php", "http://php.net/xpath");
$xpath->registerPHPFunctions();
$list = $xpath->query("//a[php:function('MyClass::doesNothing', string(@href))]");
echo $i++, "\r";
libxml_clear_errors();
usleep(10000);
}I'm running PHP 8.1.18 and PHP 8.2.6 from Ondřej Surý packages on a Ubuntu 22.04 server. The problem is also present with the vanilla PHP (8.1.2).
I'm attaching the zipped hacks.html used in the above code for convenience but any HTML will trigger the issue.
hacks.zip
PHP Version
PHP 8.2.6
Operating System
Ubuntu 22.04